Lincoln-electric IM351 LN-7 GMA Wire Feeder User Manual

LN-7 and LN-7 GMA Wire Feeders(2 and 4 Roll Models)OPERATORʼS MANUALIM351-DJune 2013Safety Depends on YouLincoln arc welding and cuttingequipment is d

A-3INSTALLATION LN-7 & LN-7 GMAA-31. For K291 and K404 cables, connect the end of thecontrol cable with the lugged leads to the powersource. If

A-4INSTALLATION LN-7 & LN-7 GMAA-45. Connect the input control cable polarizedAmphenol plug into the mating 6-pin receptacleon the rear of the c

A-5INSTALLATION LN-7 & LN-7 GMAA-5FIGURE A.3 – LN-7 & LN-7 GMA TO DC-400, DC-250 AND CV/CVI POWER SOURCES WITHTERMINAL STRIP - CONNECTION DI

A-6INSTALLATION LN-7 & LN-7 GMAA-6FIGURE A.4 – LN-7 & LN-7 GMA TO PULSED POWER 500 - CONNECTION DIAGRAM.–+CLEVELAND, OHIO U.S.AELECTRICSHOCK

A-7INSTALLATION LN-7 & LN-7 GMAA-7FIGURE A.5 – LN-7 & LN-7 GMA TO CV/CVI POWER SOURCES WITH 14 PIN AMPHENOLCONNECTOR - CONNECTION DIAGRAM.EL

A-8INSTALLATION LN-7 & LN-7 GMAA-8FIGURE A.6 – LN-7 & LN-7 GMA TO CV/CVI POWER SOURCES WITH TWIST-MATE CONNECTORAND 14 PIN AMPHENOL/REMOTE C

A-9INSTALLATION LN-7 & LN-7 GMAA-9FIGURE A.7 – LN-7 & LN-7 GMA TO CV/CVI POWER SOURCE (K867/K775) - CONNECTION DIAGRAM.–+CLEVELAND, OHIO U.S

A-10INSTALLATION LN-7 & LN-7 GMAA-10FIGURE A.8 – LN-7 & LN-7 GMA TO R3S-250 OR R3S-325 - CONNECTION DIAGRAM.–+CLEVELAND, OHIO U.S.AELECTRICS

A-11INSTALLATION LN-7 & LN-7 GMAA-11FIGURE A.9 – LN-7 & LN-7 GMA TO SAM MOTOR GENERATOR OR ENGINE WELDER - CONNECTIONDIAGRAM.CLEVELAND, OHIO

A-12INSTALLATION LN-7 & LN-7 GMAA-12FIGURE A.10 – LN-7 & LN-7 GMA TO DC-600 - CONNECTION DIAGRAM.–+CLEVELAND, OHIO U.S.AELECTRICSHOCKCAN KI

FOR ENGINEpowered equipment.1.a. Turn the engine off before troubleshooting and maintenancework unless the maintenance work requires it to be running.

A-13INSTALLATION LN-7 & LN-7 GMAA-13FIGURE A.11 – LN-7 & LN-7 GMA TO R3S-400, 600, OR 800 - CONNECTION DIAGRAM.CLEVELAND, OHIO U.S.AELECTRIC

A-14INSTALLATION LN-7 & LN-7 GMAA-14FIGURE A.12 – LN-7 & LN-7 GMA TO MOST LINCOLN MOTOR GENERATORS - CONNECTION DIAGRAM.32CLEVELAND, OHIO U.

A-15INSTALLATION LN-7 & LN-7 GMAA-15FIGURE A.13 – LN-7 & LN-7 GMA TO WP250 OR G9 PRO - CONNECTION DIAGRAM.CLEVELAND, OHIO U.S.AELECTRICSHOCK

A-16INSTALLATION LN-7 & LN-7 GMAA-16FIGURE A.14 – LN-7 & LN-7 GMA TO RANGER 9 – CONNECTION DIAGRAM.ELECTRICSHOCKCAN KILLDO NOT OPERATE WITH

A-17INSTALLATION LN-7 & LN-7 GMAA-17FIGURE A.15 – LN-7 & LN-7 GMA TO RANGER 10-LX – CONNECTION DIAGRAM.ELECTRICSHOCKCAN KILLDO NOT OPERATE

A-18INSTALLATION LN-7 & LN-7 GMAA-18FIGURE A.16 – LN-7 & LN-7 GMA TO POWER SOURCES WITH NO OUTPUTCONTACTOR - CONNECTION DIAGRAM.CLEVELAND, O

A-19INSTALLATION LN-7 & LN-7 GMAA-19FIGURE A.17 – LN-7 & LN-7 GMA TO POWER SOURCES WITH CONTACTOR AND NO TERMINALSTRIP - CONNECTION DIAGRAM.

A-20INSTALLATION LN-7 & LN-7 GMAA-20FIGURE A.18 – LN-7 & LN-7 GMA TO FLEXTEC 650 - CONNECTION DIAGRAM.14-PIN CONTROL CABLE K1818-XXELECTRODE

A-21INSTALLATION LN-7 & LN-7 GMAA-21WORK CABLEConnect a work lead of sufficient size and length(Table A.2) between the proper output stud on the

A-22INSTALLATION LN-7 & LN-7 GMAA-22WATER CONNECTIONS(FOR WATER COOLED GUNS)The LN-7 or LN-7 GMA must have a K527 WaterSolenoid Kit installed (s

iiSAFETYiiARC RAYS can burn.4.a. Use a shield with the proper filter and coverplates to protect your eyes from sparks andthe rays of the arc when weld

A-23INSTALLATION LN-7 & LN-7 GMAA-23SHIELDING GAS HOOKUP (LN-7 GMAor LN-7 with Optional K494 Gas SolenoidInstalled)Gas under pressure is explosi

B-1OPERATIONB-1GENERAL DESCRIPTIONThe K440 LN-7 GMA semiautomatic constant speedwire feeder is specifically equipped for gas metal arcwelding using fl

B-2OPERATIONB-2RECOMMENDED PROCESSES ANDEQUIPMENTThe LN-7 GMA is recommended for use in MIG andInnershield welding applications, the LN-7 isrecommende

B-3OPERATIONB-3PURGE - COLD INCH SWITCH (OPTIONAL). Thiscontrol, located on the optional K418 GMA Timer Kit,provides control of some wire feeder funct

B-4OPERATIONB-4LN-7 & LN-7 GMAFIGURE B.2 – INSTALLING DRIVE ROLLS ON A TWO-ROLL FEEDER.Roll Pressure Setting procedure detailed later inthis secti

B-5OPERATIONB-5CHANGING DRIVE ROLLS FOR FOUR-ROLL WIRE FEEDERS:To change drive rolls on a four-roll wire feeder, refer toFigure B.3 and perform the fo

B-6OPERATIONB-6LN-7 & LN-7 GMAFIGURE B.3 – INSTALLING DRIVE ROLLS ON A FOUR-ROLL FEEDER.CLAMPINGCOLLARSPACER (IFREQUIRED)DRIVEROLLHALVESKEYOUTPUT

B-7OPERATIONB-7IDLE ROLL PRESSURE SETTINGThe idle roll pressure is set at the factory. Two-rollfeeders are set with the pressure adjustment knobbacked

B-8OPERATIONB-8WIRE LOADINGWIRE REEL LOADING – READI-REELSAND SPOOLSTO MOUNT A 30 LB READI-REEL PACKAGEUSING THE MOLDED PLASTIC K363-P TYPEADAPTER:1.

B-9OPERATIONB-9TO MOUNT 10 TO 30 LB SPOOL (12” DIAMETER):(For 8 in. spools a K468 spindle adapter must beused.)1. Remove the locking collar and Read-R

iiiSAFETYiiiFOR ELECTRICALLYpowered equipment.8.a. Turn off input power using the disconnectswitch at the fuse box before working onthe equipment.8.b.

B-10OPERATIONB-10WIRE REEL LOADING – 50 AND 60 LBCOILS (K303 OR K376 WIRE REEL STAND)ADJUSTABLE WIRE REEL BRAKEThe mount for standard 50 and 60 pound

B-11OPERATIONB-11FEEDING ELECTRODE1. Turn the reel until the free end of the electrode isaccessible.2. While tightly holding the electrode, cut off th

B-12OPERATIONB-12ACCELERATION SETTINGThe LN-7 and LN-7 GMA can be configured foroptimum starting for different procedures by selectingbetween two spee

B-13OPERATIONB-13MAKING A WELD1. Inch the electrode through the gun and cable. Forsolid wire, cut the electrode within approximately3/8 in. of the end

B-14OPERATIONB-14FLUX TANK LOADINGK320 FLUX TANK (OPTIONAL)Either turn off the incoming air line or remove the quickdisconnect if one has been install

C-1ACCESSORIESC-1GENERALThe following is a list of the accessories that can beused with the LN-7 GMA wire feeder. LN-7 & LN-7 GMAProduct Number Na

C-2ACCESSORIESC-2AUXILIARY EQUIPMENTCONNECTIONThe power for 115 volt AC auxiliary equipment can beobtained from the 7 and 32A terminals inside thecont

WELDING GUNSINNERSHIELD GUNSThe K126 gun and cable assembly is recommendedfor most welding with 0.062 in. through 3/32 in.Innershield electrodes at up

SUBMERGED ARC GUNSThe K112 gun and cable assembly is recommendedfor welding with 1/16 in. solid steel electrode at up to500 amps. The K113 gun and cab

D-1MAINTENANCED-1ROUTINE MAINTENANCEDRIVE ROLLS AND GUIDE TUBESAfter feeding every coil of wire, inspect the drive rollsection. Clean the assembly as

ivSAFETYivPRÉCAUTIONS DE SÛRETÉPour votre propre protection lire et observer toutes les instruc-tions et les précautions de sûreté specifiques qui par

D-2MAINTENANCED-2Gun Cables (All)A dirty gun cable can cause rough and erratic wirefeeding. Therefore, the cable liner must be cleanedperiodically.

D-3MAINTENANCED-3LN-7 & LN-7 GMAThe following Figures D.1 and D.2 should serve as aguide to determine if a particular gun or switch can beconnecte

D-4MAINTENANCELN-7 & LN-7 GMAD-4LN-7 SEQUENCE OF OPERATION (Optional Timer Kit not Installed)Turn on Power SourceCloses 524-525Closes 31-7A circui

LN-7 & LN-7 GMAE-1TROUBLESHOOTING & REPAIRE-1If for any reason you do not understand the test procedures or are unable to perform the tests/re

E-2TROUBLESHOOTING & REPAIRE-2LN-7 & LN-7 GMAObserve all Safety Guidelines detailed throughout this manualIf for any reason you do not underst

E-3TROUBLESHOOTING & REPAIRE-3LN-7 & LN-7 GMAObserve all Safety Guidelines detailed throughout this manualIf for any reason you do not underst

F-1WIRING DIAGRAMF-1LN-7 & LN-7 GMA1324655672150850952652556721OPTIONALANALOG METERKIT PLUGOPTIONAL DIGITALMETER KITPLUGP5J5DCFBAE.CR252652721GLPR

NOTES LN-7 & LN-7 GMA

NOTES LN-7 & LN-7 GMA

NOTES LN-7 & LN-7 GMA

LN-7 & LN-7 GMAvvThank Youfor selecting a QUALITY product by Lincoln Electric. We want youto take pride in operating this Lincoln Electric Company

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LN-7 & LN-7 GMAvi TABLE OF CONTENTSPageSafety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A-1LN-7 & LN-7 GMAA-1INSTALLATIONTECHNICAL SPECIFICATIONS – LN-7 and LN-7 GMAINPUT VOLTAGEWIRE FEED SPEEDWIRE DIAMETERSPHYSICAL DIMENSIONSSupplie

A-2INSTALLATION LN-7 & LN-7 GMAA-2MOUNTING LOCATIONThe LN-7 and LN-7 GMA wire feeder can be mounteddirectly on top of the power source providing